/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package api

import "fmt"

// Image is a definition of a Docker image.
type Image struct {
	Domain string `json:"domain,omitempty"`
	Name   string `json:"name,omitempty"`
	Tag    string `json:"tag,omitempty"`
}

// IsEmpty verifies if this Image instance is empty.
func (i *Image) IsEmpty() bool {
	return len(i.Domain) == 0 &&
		len(i.Name) == 0 &&
		len(i.Tag) == 0
}

// String representation of this Image.
func (i *Image) String() string {
	if i.IsEmpty() {
		return ""
	}
	return fmt.Sprintf("%s/%s:%s", i.Domain, i.Name, i.Tag)
}
